Locomotive structure



Jan. 30, 1934. 1,944,893

K. S, HOWARD LOCOMOTIVE STRUCTURE 5 Sheets-Sheet 1 Filed March 16. 1932 Wren/0r Jan. 30, 1934. 5 HOWARD 1,944,893

' LOCOMOTIVE STRUCTURE Filed March 16. 1932 5 Sheets-Sheet 2 Jan. 30, 1934. s, HOWARD LOCOMOTIVER STRUCTURE Filed March 16. 1932 5 Sheets-Sheet -4 @PkiL Jan. 30, K, s HOW RD LOCOMOTIVE STRUCTURE Filed March 1.6. 1932 5 Shets-S'neet 5 Wye/War a /J/Cawand Q/fornzy Patented Jan. so, 1934 1344,893

LoooMo'rIvs STRUCTURE Karl S. Howard, Philadelphia, Pa., assignor to General Steel Castings Corporation, Granite City, 111., a corporation of Delaware Application March 16, 1932. Serial No. 599,292 19 Claims. (01. 105-44) This invention relates to railway rolling stock igure 6 is a View corr sp d With Figure 4 and consists in a novel locomotive underframe but illustrating a modification. construction and particularly in the arrangement Figure '7 is a vertical longitudinal section taken of exhaust steam piping and smoke box supports. on line 7 -7 of Figure Heretofore it has been the usual practice in Figure 8 is a Pa al top V w Of a o dic locomotive construction to support the front end 13881310 1- of the boiler or smokebox upon a rigid saddle Figure 915 a S de V ew Of t e Samemember projecting upwardly from the underu e 0 i a ha front V w f the Sameframe. The cylinders and valve chambers are gures 1, and 13 941% side, and from frequently i; integral with the saddle and are views, respectively, of still another modification. 5 located substantially in transverse alignment In gu e 1 t0 inclusive, is illustrated the therewith. The exhaust pipes extend inwardly front end of anintesral locomotive di ludins and upwardly through the saddle and merge in box section main frame member 1, front deck the upper part thereof in upright passages which structure 17, and pilot beam mounting 18. The connect with the exhaust nozzle inside the smoketop and bottom webs of main frame member 1 box. v are provided at 2 and 3 with laterally extended Due to the intermittent passage of hot steam triangular portions which cooperate with vertical through the exhaust passages, the portions of webs 4 and 5 to form a transverse beam extendthe underirame immediately adjacent the pasing across the bed for supporting main steam 2i? sages are subjected to strains which frequently cylinders 6 and valve chambers '7. cause cracks to develop in the casting. In order Cylinders 6, projecting forwardly from the to relieve the structure of these strains it has been ends of this transverse beam structure, are spaced suggested to separate the exhaust pipes on oppofrom the adjacent portion of the underframe and site sides from each other and from the cylinder have integral backheads 8 which merge with 25 saddle except at the points at which the pipes vertical web 5. Copending application Serial No. pass through the side walls of the saddle. Also 547,136, filed June 26, 1931, in the name of the the arcuate bottom plate of the smokebox has present applicant illustrates and describes in been corrugated or recessed to better adapt the detail a locomotive bed having a similar transmember to withstand expansion and contraction. verse beam and cylinder construction. Structures utilizing the above features are dis- A boiler saddle 9 projects upwardly from the closed in copending applications, Serial No. bed above the transverse beam structure for sup- 541,894, filed June 3, 1931 in the names of E. G. porting the front end of the boiler or smokebox Hallquist and myself, and Serial No. 547,137 filed wall 12. Pairs of exhaust pipes 10 extend in- June 26, 1931 in the name of the present applicant. wardly from the ends of valve chambers 7 and 35 The general object of the present invention, as merge with separate upright passages having in the above mentioned applications, is to probolting flanges 11. The exhaust pipes are spaced vide improved means for preventing unequal forwardly of saddle 9 throughout their lengths strains from being set up within the cylinder and the opposing pairs are also spaced from each saddle and underframe. I attain this object and other. others substantially by completely separating the The smokebox bottom plate 12 is bulged, as at exhaust passages from the smokebox saddle and 2e, to provide for properly seating flanges 11 and adjacent underframe structure and also separathas a curved portion 13 between the exhaust pipes ing the opposing pairs of exhaust pipes from each to accommodate expansion and contraction in other. In the drawings which illustrate the inthe pipes. An inverted v-shaped nozzle 21 is 45 ventionbolted or riveted to flanges 11 and plate 12, the Figure 1 is, in part, a top View of the front end nozzle having bottom flanges 21a for cooperating of a locomotive underframe embodying the inwith flanges 11 to form an air tight joint with the vention and, in part, a horizontal section taken smokebox wall.

substantially on line 1-1 of Figure 4. Projecting upwardly from each side of deck 50 Figure 2 is a side View of the structure. structure 17 are pump brackets 14 braced by 6.1- Figure 3 is a front view of the same. agonal ribs 15 and 16. A bracket 19 extends be- Figure 4 is a vertical transverse sectional View tween ribs 16 and mounts an expansion plate 20 taken substantially on the line 4-4 of Figure 1. which supports the front end of the smokebox Figure 5 is a half horizontal section taken on wall 12. 55 the line 5-5 of Figure 2. r In Figures 6 and 7, exhaust pipes 22 are located in the pipes.

rearwardly of saddle 27 and extend through an opening 25 in the bottom of the smokebox wall 23, and connecting flanges 2% on the exhaust pipes are made horizontal to simplify the necessary machining operations. A separate recessed plate 26 is secured over opening 25 and is bolted between flanges 24 and the corresponding flanges 2811 on the lower ends of inverted V-shaped nozzle 28.

In Figures 8 to 10, boiler saddles 29 and 30 are provided on each side of exhaust pipes 31 extending between valve chambers 32. The forward saddle 30 extends between the rear ends of pump brackets 33 and replaces expansion plate 20 in Figures 1 to 5. This modification otherwise conforms with that in Figures 1 to 5.

In Figures 11 to 13, U-shaped exhaust pipes 34 and 35 are formed separately and bolted to the ends of valve chambers 36 and to the lower legs of three way pipe sections 37. The upright legs of pipes 37 connect with the exhaust nozzle, not shown, within the smokebox and which may be of inverted V-shape as in Figure 6. Pump brackets 38 and expansion plate bracket 39 project up- Wardly from the front deck structure, as in Figures l to 5. Brackets 40 for the valve gear combination lever are shown formed integral with pipe 35. These brackets, however, may be secured to adjacent structure in any suitable manner.

In each of the forms, the exhaust piping, which is subject to marked fluctuations of temperature due to the intermittent passage of hot steam, is completely isolated from the adjacent underframe and boiler supports so that these parts can not be affected by expansion or contraction Moreover the separation of the pairs of exhaust pipes leading from each valve chamber and the appropriate shaping of the lower portions of the smokebox wall permit unlimited lateral expansion and contraction of the exhaust pipes relative to each other.

Obviously various features of the different forms may be interchanged, where desired, and the forms may be modified as to details without departing from the spirit of the invention. Many of the features may be advantageously embodied in a built-up underframe, although the integral structure illustrated is preferable because of the increased strength and decreased weight due to the more advantageous distribution of metal, and the consequent elimination of much of the labor and expense of machining and fitting various joints and the elimination of the necessity of frequent inspection after the locomotive is in service.

The exclusive use of these and such other modifications as come within the scope of the appended claims is contemplated.

What is claimed is:

1. In a locomotive underframe structure, a boiler support, spaced valve chambers, and main exhaust steam pipes extending inwardly from said chambers at the level of said support but outside thereof and then upwardly, said passages being spaced throughout their lengths from each other and from the remaining portions of the structure.

2. In a locomotive, an underframe structure including spaced boiler supports and valve chambers at each side of said structure, a smokebox supported by at least one of said boiler supports, and exhaust steam pi es extending between said supports from said chambers to said smokebox, said pipes being spaced throughout their lengths from each other and from the remaining portions of said structure.

3. In a locomotive, an underframe structure including a rigid boiler saddle and an expansion plate bracket spaced forwardly of said saddle, and a main exhaust steam pipe positioned at least partially between said saddle and said bracket and spaced from both and from the remaining portions of said structure.

4. A locomotive underframe structure including valve chambers, a rigid boiler support and an expansion plate bracket positioned forwardly of said support, and main exhaust steam passages extending inwardly and upwardly from said chambers and between said support and bracket, said passages being spaced from each other and the remaining portions of said structure.

5. In a locomotive underframe structure, a front deck, pump brackets projecting upwardly on each side thereof, and an expansion plate bracket extending between said pump brackets.

6. A locomotive underframe integral structure comprising a front deck member, pump brackets projecting upwardly on each side thereof, and

an expansion plate bracket extending between said pump brackets and bracing the same.

'7. In a locomotive underframe structure, spaced rigid boiler saddles, and an exhaust steam passage positioned at least partially between said saddles and spaced throughout its length therefrom and from the remaining portions of the structure. 7

8. A locomotive integral underfrarne structure including spaced rigid boiler saddles, valve chambers at each side of the structure, and exhaust steam pipes extending inwardly and upwardly from said chambers between said saddles and spaced throughout their lengths from the remaining portions of the structure.

9. In a locomotive underframe structure, a

transverse laterally projecting beam-like element, main steam cylinders and valve chambers supported by said element and spaced from the underframe, a boiler support, and exhaust steam pipes extending inwardly and upwardly from said chambers and spaced throughout their lengths from said support and the remaining portions of the structure.

10. In a locomotive, an underframe structure including valve chambers and a boiler saddle, a smokebo-x supported by said saddle, and exhaust steam passages extending from said chambers into said smokebox and spaced throughout their lengths from each other and from said structure, and an inverted V-shaped exhaust noz- '5' zle inside said smokebox and connecting with said passages, said passages and nozzle having bolting flanges on their corresponding ends receiving the lower Wall of said smokebox between them and forming air tight joints therewith.

11. In a locomotive, an underframe structure including valve chambers and a boiler saddle, a smokebox supported by said saddle, said smokebox having an opening in its lower wall spaced from said saddle, exhaust steam passages extend- 1'.

ing from said chambers through said opening and spaced throughout their lengths from said saddle and said member and having bolting flanges on their upper ends, and a plate secured over said opening and having a portion shaped to form air tight joints with said flanges and depressed portions adapted to permit expansion and contraction of said passages without unduly straining said plate.

12.111 a locomotive underframe structure,

valve chambers, a boiler support, and exhaust steam passages extending inwardly from said chambers at the level of said support and then upwardly, said passages comprising separately formed pipe sections bolted to said chambers and spaced throughout their lengths from each other and the remaining portions of said structure.

13. In a locomotive, an underframe structure including valve chambers at the sides thereof and a boiler support, a smokebox supported by said support, and pairs of exhaust passages extending from said chambers into said smokebox and spaced throughout their lengths from the remaining portions of said structure, each of said pairs including a pair of separately formed U- shaped pipes bolted to one of said chambers, and a three-way pipe section, the lower legs of said section connecting with the inner ends of said pair of U-shaped pipes, and the upright leg thereof leading into said smokebox and making an air tight joint with the lower wall thereof.

14.. In a locomotive, an underframe structure including a boiler support, valve chambers, exhaust steam pipes extending inwardly from said chambers and spaced throughout their lengths from the remaining portions of the structure and from each other, and a valve gear bracket projecting from said pipes, and an exhaust nozzle having leg parts secured to said pipes and bracing the same.

15. In a locomotive, an underframe structure including a boiler support and valve chambers, a smoke box supported by said boiler support, and pairs of exhaust steam pipes extending from said chambers to said smoke box, each of said pairs being spaced from the other and from the remaining portions of said structure and being supported solely by the lower wall of said smoke box and the associated chamber.

16. In a locomotive, an underframe structure including a rigid boiler support, a smoke box thereon, valve chambers positioned longitudinally of said supportin the direction of the end of said smoke box, and main exhaust passages extending inwardly from said chambers beneath said smoke box and then upwardly and spaced throughout their lengths from each other and the remaining portions of the structure.

17. In a locomotive, an underframe structure including valve chambers and a boiler saddle, a smoke box supported by said saddle, and exhaust steam passages extending from said chambers into said smoke box and spaced throughout their lengths from each other and from said structure, and an exhaust nozzle extending within said smoke box and having legs secured to and bracing said passages.

18. In a. locomotive, an underframe structure including valve chambers at the sides thereof and a boiler support, a smoke box supported by said saddle, pairs of exhaust passages extending from said chambers into said smoke box and spaced throughout their lengths from said structure, each of said pairs including sections extending inwardly at the level of said support, and an exhaust nozzle extending within said smoke box and having legs connecting with and bracing said sections.

19. In a locomotive, an underframe structure including a valve chamber and a boiler support, exhaust passages extending inwardly from said chamber and spaced from each other and the remaining portions of the structure, and a valve gear bracket on one of said passages, the passages comprising each pair merging in an exhaust outlet whereby said passages mutually brace each other.

KARL S. HOWARD. 

